linux-toradex.git/drivers/s390/block, branch v3.18-rc1

Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block

2014-10-18T19:12:45+00:00

Pull block layer driver update from Jens Axboe:
 "This is the block driver pull request for 3.18.  Not a lot in there
  this round, and nothing earth shattering.

   - A round of drbd fixes from the linbit team, and an improvement in
     asender performance.

   - Removal of deprecated (and unused) IRQF_DISABLED flag in rsxx and
     hd from Michael Opdenacker.

   - Disable entropy collection from flash devices by default, from Mike
     Snitzer.

   - A small collection of xen blkfront/back fixes from Roger Pau Monné
     and Vitaly Kuznetsov"

* 'for-3.18/drivers' of git://git.kernel.dk/linux-block:
  block: disable entropy contributions for nonrot devices
  xen, blkfront: factor out flush-related checks from do_blkif_request()
  xen-blkback: fix leak on grant map error path
  xen/blkback: unmap all persistent grants when frontend gets disconnected
  rsxx: Remove deprecated IRQF_DISABLED
  block: hd: remove deprecated IRQF_DISABLED
  drbd: use RB_DECLARE_CALLBACKS() to define augment callbacks
  drbd: compute the end before rb_insert_augmented()
  drbd: Add missing newline in resync progress display in /proc/drbd
  drbd: reduce lock contention in drbd_worker
  drbd: Improve asender performance
  drbd: Get rid of the WORK_PENDING macro
  drbd: Get rid of the __no_warn and __cond_lock macros
  drbd: Avoid inconsistent locking warning
  drbd: Remove superfluous newline from "resync_extents" debugfs entry.
  drbd: Use consistent names for all the bi_end_io callbacks
  drbd: Use better variable names

s390/dasd: add support for control unit initiated reconfiguration

2014-10-09T07:13:54+00:00

Add support for Control Unit Initiated Reconfiguration (CUIR) to
Linux, a storage server interface to reconcile concurrent hardware
changes between storage and host.

Reviewed-by: Stefan Weinhuber 
Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

s390/dasd: fix infinite loop during format

2014-10-09T07:13:51+00:00

Error recovery requests may not be cleaned up correctly so that other
needed erp requests can not be build because of insufficient memory.
This would lead to an infinite loop trying to build erp requests.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

block: disable entropy contributions for nonrot devices

2014-10-04T16:55:32+00:00

Clear QUEUE_FLAG_ADD_RANDOM in all block drivers that set
QUEUE_FLAG_NONROT.

Historically, all block devices have automatically made entropy
contributions.  But as previously stated in commit e2e1a148 ("block: add
sysfs knob for turning off disk entropy contributions"):
    - On SSD disks, the completion times aren't as random as they
      are for rotational drives. So it's questionable whether they
      should contribute to the random pool in the first place.
    - Calling add_disk_randomness() has a lot of overhead.

There are more reliable sources for randomness than non-rotational block
devices.  From a security perspective it is better to err on the side of
caution than to allow entropy contributions from unreliable "random"
sources.

Signed-off-by: Mike Snitzer 
Signed-off-by: Jens Axboe

s390/dasd: Make module parameter visible in sysfs

2014-09-01T07:56:28+00:00

Change the visibility of the dasd parameter of kernel module dasd_mod
to be consistent with the eer_pages parameter.

Signed-off-by: Peter Oberparleiter 
Acked-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

s390/dasd: fix camel case

2014-08-01T09:16:18+00:00

Rename enable_PAV to enable_pav.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

dasd: fix error recovery for alias devices during format

2014-07-22T07:26:23+00:00

Kernel panic or a hanging device during format if an alias device is
set offline or I/O errors occur.

Omit the error recovery procedure for alias devices and do retries on
the base device with full erp.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

dasd: fix list_del corruption during format

2014-07-22T07:26:23+00:00

If I/O errors occur during format a kernel panic with a list_del
corruption may occur.

Stop error recovery procedure after an erp action was taken.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

dasd: fix unresponsive device during format

2014-07-22T07:26:22+00:00

If path events occur the formatting process stucks because path
events may flush format requests from the queue.

Kick the format process after path events are handled.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

dasd: use aliases for formatted devices during format

2014-07-22T07:26:21+00:00

Formatting of a previously formatted device is slower than newly
format a device when alias devices are available.
For already formatted devices the alias devices are not used for
formatting.

Fix the alias handling for already formatted devices.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky